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2-4. Replacing the Backup Battery 2-5. Notes on Repair Parts
2-4. Replacing the Backup Battery
n When replacing the lithium battery, ensure that the marks + and _ are correctly oriented. If connected incorrectly, injuries and damage to objects in the periphery may result from tears and leakage of fluid. The unit is equipped with a battery for data backup (BT1) on the CPU-293 board. When replacing, be sure to use the following specified part. Replacement Part: Part Description: Part No.: BT1/CPU-293 board (E4) CR-2450 (lithium battery) 1-528-229-41
The CPU-293 board incorporates a clock for recording the time and date at which the reference files and scene files were stored in the IC memory card. The backup battery maintains the time of the clock when the power is OFF. Therefore, when data is stored on the IC memory card with worn out battery, the correct time and date will not be recorded. When writing the data in the IC memory card with battery starting to run out, an alarm message will be displayed on the EL display. Replace the battery when this alarm message is displayed. After replacement, set the time and date. (Refer to the operation manual.) Even if the battery runs out, the correct time and date can be recorded by setting the time of the unit before writing the data on the IC memory card.
2-5. Notes on Repair Parts
1. Safety Related Components Warning w Components marked ! are critical to safe operation. Therefore, specified parts should be used in the case of replacement. 2. Standardization of Parts Some repair parts supplied by Sony differ from those used for the unit. These are because of parts commonality and improvement. Parts list has the present standardized repair parts. 3. Stock of Parts Parts marked with �o� at SP (Supply Code) column of the spare parts list may not be stocked. Therefore, the delivery date will be delayed. 4. Units Representation The following represented units are changed or omitted in writing.
Units Capacitance Inductance Resistance uF uH Z Representation uF uH Abbreviation
2-6 (E)
BKP-7934 IMM
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